Among color parameters, the decreases in L⁎, a⁎ and b⁎ values and increases
in ΔE and BD values were the characteristic changes in cloudy
and clear juices during 6 months of storage at 4 and 25 °C (Table 1),
that corresponded with a gradual degradation of the red color as observed.
The color parameters, except b* value, were closely correlated
(Pb0.05) to anthocyanin contents in both juices, and the highly positive
correlation (r=0.903–0.922, pb0.05) between a⁎ value and ascorbic acid content in both juices was also observed, suggesting that there was
also a possible interaction between ascorbic acid and anthocyanins, and
that the oxidative degradation of ascorbic acid induced the degradation
of anthocyanins, which finally led to the degradation of the red color.